User's Manual

PN 8700-10 Help Hot Line (U.S. only): 1-800-530-9960 8-31
620003-0
PRELIMINARY System Gain
8.3 System Gain
The system gain can be decreased from 15 dB to 0 dB gain in 1 dB increments and
the uplink and downlink gain of any RAU can be decreased by 10 dB in one step
using AdminManager or OpsConsole.
8.3.1 System Gain (Loss) Relative to ScTP Cable Length
The recommended minimum length of ScTP cable is 20 meters (66 ft) and the recom-
mended maximum length is 100 meters (328 ft). If the ScTP cable is less than 10
meters (33 ft), system performance may not meet specifications. If the ScTP cable is
longer than 100 meters (328 ft), the gain of the system will decrease, as shown in
Table 8-27.
I need 2.1 GHz figures for this table. JW
Table 8-27 System Gain (Loss) Relative to ScTP Cable Length
ScTP Cable
Length
Typical change in system gain (dB)
Downlink Uplink
800 MHz TDMA/AMPS and CDMA; 900 MHz GSM and
EGSM; and iDEN
110 m / 361 ft –1.0 –0.7
120 m / 394 ft –3.2 –2.4
130 m / 426 ft –5.3 –4.1
140 m / 459 ft –7.5 –5.8
150 m / 492 ft –9.7 7.6
1800 MHz GSM (DCS); 1900 MHz TDMA, CDMA, and GSM
110 m / 361 ft –1.0 –0.7
120 m / 394 ft –4.0 –2.4
130 m / 426 ft –6.4 –4.1
140 m / 459 ft –8.8 –5.8
150 m / 492 ft –11.3 –7.6
2.1 GHz UMTS
110 m / 361 ft
120 m / 394 ft
130 m / 426 ft
140 m / 459 ft
150 m / 492 ft